Code example for ScheduledExecutorService

Methods: shutdown

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		// 30Ãëºó½áÊø¹Ø±ÕÈÎÎñ£¬²¢ÇҹرÕScheduler 
		scheduler.schedule(new Runnable() { 
			public void run() { 
				beeperHandle.cancel(true); 
				beeperHandle2.cancel(true); 
				scheduler.shutdown(); 
			} 
		}, 30, SECONDS); 
	} 
}